being able to acces to properties from XML contrib

It would be very usefull to be able to reference properties in contributions. I am thinking for instance of query-models and providers : in my project there are many paginations. The customer wants to be able to control the pagination parameter of its application's screen. For now, the only solution will be to put the corresponding contributions in config folders. It is very risky because he can by mistake modify much more than the number of lines per page.

I would give a .properties in which he would modify the itemPerPage value and the property would be used where needed.